Desalination. The most appropriate
alternative, actually. Instead of iceberg transportation from distant
latitudes, there could be build desalinating facilities around the coastal
lines, and to pipe the obtained sweet water deep into the desert.

Methane. Just like the icebergs -
depending on the utilization this gas could be considered as a threat - greenhouse
gas, or as an advantage - energy/H2 source.
10 to the 9th tonnes of methane are flared off by oil wells each year. Anyone
who has taken elementary chemistry can calculate how much water is produced in
burning that amount of methane.In
order to condense it out one must cool the exhaust, and the best way to do that
is to evaporate sea water, which when added to the water condensed from the
burnt methane gives much more than 10 to the 9th tonnes of fresh water.

Weather
modification. Dispersing silver iodide in the sky through planes or
rockets. The moisture from clouds forms droplets around the small particles,
and this leads to raining.

DriWater. This is
very progressive technology that transforms liquid water into jelly. Then
certain quantity of this jelly is placed near the stem, and the roots of the
plant thus securing its constant irrigation. Because of the consistence of the
jelly the water is not absorbed at once, but in certain period of time, defined
by density and quantity.

All these and other water delivering methods require
price and ROI calculation, as well as comprehensive computer simulation. Each
one of them could be considered as too expensive in one point of view and most
preferable in another one. That is why perhaps the best way is to use
combination between all of them, and to apply the most appropriate one in
specific situations.